Hi! There is a thermodynamics problem which I seem to be able to understand, yet unable to solve. If someone can me with it I would appreciate it. 1. The problem statement, all variables and given/known data A Bi-metallic strip is straight at T= T0. It curves as it is heated up due to unequal expansion of two metals. The strip is made up of iron (a = 1.2e-5) and zinc (a = 3.1e-5). The question asks to calculate the bending angle when the original length of the strip is 100mm and with thickness of 1 mm. 2. Relevant equations The linear expansion equation: L = L0(1 + a(T2 - T0)) 3. The attempt at a solution The substituted equations: LI = (100)(1 + (1.2e-5)([tex]\Delta[/tex]T) LZ = (100)(1 + (3.1e-5)([tex]\Delta[/tex]T) From here I use the formula s = r[tex]\theta[/tex] and get [tex]\theta[/tex] = (3.8e-3)([tex]\Delta[/tex]T) I am not sure how to proceed from here because the question asks for a numerical answer but that seems impossible without the temperatures given.